Healthy Metabolism™

Spaying or Neutering
Can Change a Cat's Nutritional Needs.
That Calls for a Special Blend

Introducing a Purina One SmartBlend Innovation

We believe spaying and neutering is a responsible choice with many benefits. Besides preventing unwanted litters, these procedures can help cats live a long, healthy life. In addition, spaying or neutering may help tone down unwanted behaviors like food guarding, territory marking and aggression towards people or other pets.

However, when a cat is spayed or neutered, their body can undergo changes. They may experience a drop in hormone levels, a shift that can often translate to a slower metabolism, decreased activity, and in turn, weight gain.

Most cats in the US are spayed or neutered. So we set out to create a formula specifically designed to help these cats burn fat more efficiently and maintain a healthy weight. We call it Purina ONE® SMARTBlend® Healthy Metabolism™.

This special blend features higher levels of protein and lower levels of fat and carbohydrate. We’ve also made L-Carnitine a key ingredient. This nutrient helps the body convert fat into energy.

More Protein Means More
of What Cats Prefer.

Omnivores, like people or dogs, derive nutrition from plant and animal sources. However, cats are carnivores by nature. This means protein is their preferred source of energy.

That’s why our dry food recipe for Healthy Metabolism has a minimum protein content of 42% - higher than our other dry foods. We chose real turkey as the #1 ingredient and combined other high quality protein sources to help support strong muscles and a healthy heart.

To provide a range of tastes and textures for your cat, also serve our protein-rich Healthy Metabolism wet foods with ocean whitefish, sole, salmon or white meat chicken.



An organelle that metabolizes chemical compounds to generate much of a cell’s energy.



A permeable barrier around a cell or the organelles within it.

Fatty Acid

Fatty Acid

Found in food or stores within the body, these compounds can be converted into energy.



This nutrient helps transport fatty acids into the mitochondria.



L-Carnitine Puts Fat to Use.

A nutrient found in muscle and tissues of a cat’s common prey, L-Carnitine works at the cellular level to transport fatty acids into the mitochondria. These structures act as the “power plant” of the cell, and in turn, convert fatty acids into a usable source of energy.

Its use is quite common. Nutritional supplements containing L-Carnitine are often used in weight management strategies for people as well.

Wet and Dry Food: Working
Together for a Healthy Cat.

Cats are carnivores by nature. In the wild, they get to experience a variety of tastes and textures, and derive much of their hydration from their prey.

That’s why we believe wet and dry foods are better together. Dry kibble mimics the crunch of prey and helps keep teeth clean. Wet food has a protein and moisture content that’s close to a cat’s natural diet.

Together, they can enrich the feeding experience for your cat and can help promote healthy hydration while providing her with optimal nutrition she needs.

We formulated these products with optimal levels of protein, fat and carbohydrate to account for changing needs in metabolism for spayed and neutered cats.

– Fred Xu, Purina Nutritionist

See Our Innovation
in Action.